Year book of labour statistics =  annuaire des statistiques du travail = anuario de estadisticas del trabajo. 

 - 28th ed. 
 - Geneva:   International Labour Office,   1969.  
 - 757 p. ;  31 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Labor--Statistics
<br/><br/><label>Dewey Class. No.: </label>331